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<h1><a name="SECTION007000000000000000000"></a>
<a name="datatypes"></a>
<br>
5. Data Types
</h1>

<p>
The modules described in this chapter provide a variety of specialized
data types such as dates and times, fixed-type arrays, heap queues,
synchronized queues, and sets.

<p>
The following modules are documented in this chapter:

<p>
<table class='synopsistable' valign='baseline'>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-datetime.html'>datetime</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Basic date and time types.</td></tr>
  <tr><td><b><tt class='module'><a href='module-calendar.html'>calendar</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Functions for working with calendars,
                including some emulation of the <span class="Unix">Unix</span> <b class="program">cal</b>
                program.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-collections.html'>collections</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>High-performance datatypes</td></tr>
  <tr><td><b><tt class='module'><a href='module-heapq.html'>heapq</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Heap queue algorithm (a.k.a. priority queue).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-bisect.html'>bisect</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Array bisection algorithms for binary searching.</td></tr>
  <tr><td><b><tt class='module'><a href='module-array.html'>array</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Efficient arrays of uniformly typed numeric values.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-sets.html'>sets</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Implementation of sets of unique elements.</td></tr>
  <tr><td><b><tt class='module'><a href='module-sched.html'>sched</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>General purpose event scheduler.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-mutex.html'>mutex</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Lock and queue for mutual exclusion.</td></tr>
  <tr><td><b><tt class='module'><a href='module-Queue.html'>Queue</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>A synchronized queue class.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-weakref.html'>weakref</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Support for weak references and weak dictionaries.</td></tr>
  <tr><td><b><tt class='module'><a href='module-UserDict.html'>UserDict</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Class wrapper for dictionary objects.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-UserList.html'>UserList</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Class wrapper for list objects.</td></tr>
  <tr><td><b><tt class='module'><a href='module-UserString.html'>UserString</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Class wrapper for string objects.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-types.html'>types</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Names for built-in types.</td></tr>
  <tr><td><b><tt class='module'><a href='module-new.html'>new</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Interface to the creation of runtime implementation objects.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-copy.html'>copy</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Shallow and deep copy operations.</td></tr>
  <tr><td><b><tt class='module'><a href='module-pprint.html'>pprint</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Data pretty printer.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-repr.html'>repr</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Alternate <tt class="function">repr()</tt> implementation with size limits.</td></tr>
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<span class="release-info">Release 2.5.1, documentation updated on 18th April, 2007.</span>
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